test(e2e): update mock specs for splash changes

e2e/fixtures/test-helpers.ts

@@ -5,6 +5,12 @@ export const e2eEmailCredentials = {
   password: "12345678",
 };
 
+export const splashStartChatButtonName = "Start Chatting";
+
+export function getSplashStartChatButton(page: Page) {
+  return page.getByRole("button", { name: splashStartChatButtonName });
+}
+
 export async function clearBrowserState(
   context: BrowserContext,
   page: Page,
@@ -45,12 +51,12 @@ export async function enterChatFromSplash(
 
   await page.goto("/splash", { waitUntil });
 
-  const skipButton = page.getByRole("button", { name: "Skip" });
-  await expect(skipButton).toBeVisible({ timeout });
-  await expect(skipButton).toBeEnabled();
+  const startChatButton = getSplashStartChatButton(page);
+  await expect(startChatButton).toBeVisible({ timeout });
+  await expect(startChatButton).toBeEnabled();
 
   for (let attempt = 0; attempt < 3; attempt += 1) {
-    await skipButton.click();
+    await startChatButton.click();
     try {
       await expect(page).toHaveURL(expectedUrl, { timeout: 3_000 });
       return;